I know for brake calipers you can buy speed bleeders that make it a lot easier to bleed brakes. Do they have them for our hydraulic clutches too?

If there's no assembly lube/smegma in the system to restrict flow, it'll bleed itself. Gravity works.
Speed bleeders? I can't see why not, just measure the threads or compare them to a known bolt/nut.

srsly it takes like 30 seconds to bleed your clutch, there is no reason for any tool to make it faster.